Plane.



PATENTED MAY 3, 1904.

H. M. WOOD.

PLANE.

APPLICATION FILED 001*. 2. 1902.

.HO MODEL.

flaring M 14 040 /W?W Patented May 3, 1904.

UNTTED STATES PATENT OFFICE.

HARVEY M. \VOOI), OF DENVER, COLORADO.

PLANE.

SPECIFICATION forming part of Letters Patent No. 758,948, dated May 3,1904.

Application filed October 2, 1902. Serial No. 125,684. (No model.)

To aZZ whom it may concern.-

Be it known that I, HARVEY M. 'WooD, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented a certain new and use ful Improvement in Planes, of whichthe following is a specification.

My invention relates particularly to a device for automatically raisingthe plane slightly above the surface of the wood when the plane beingdrawn back.

One object of my invention is to provide a device whereby the cuttingedge of the planeiron will be prevented from dulling by coming incontact with the wood during the backward movement of the plane.

Another object of my invention is to provide a device of the characterdescribed which may be thrown into or out of operation, as desired.

Another object is to produce a device of the character described inwhich the backward movement of the plane will be free and even and notpartake of the vibration caused by the device rattling over thesaw-kerf.

Other objects are to provide a device of the character described whichis simple in construction, effective in operation, and which may beadapted to be placed upon various designs of planes.

Referring to the drawings, Figure I is a side elevation of a planeequipped with my device, a portion of the device being shown in section.Fig. II is a section taken through the device on the line II II of Fig.III. also showing part of the plane-stock. Fig. III is a sectional viewof the device, showing the parts in one position. Fig. IV is a sectionalview of the device, showingthe parts in another position. Fig. V is asectional view through the device, showing the parts in still anotherposition. Fig. V1 is a perspective of the shoe. Fig. V II is aperspective of the stop, also showing part of a locking device. Fig.VIII is a detail, partly in section, of a portion of the locking device.

- The invention includes a shoe which is rotatably mounted, preferablyat the front of the plane, and which is provided with a cam-face adaptedto contact with the surface of the .mav have bein shown in Fi IV.

wood or other material being planed for tilting the plane during theback stroke and raising the knife from the wood.

The invention also includes means for throwing the device into or out ofoperation and means for locking the device in either operative orinoperative position.

1 designates a shoe which is provided with a pair of oppositely-arrangedlugs 2 on each side thereof. The lugs 2 are perforated, as at 3.

a designates a flat face which lies at an angle to the plane of the mainportion of the shoe. The shoe is rotatabl y mounted on a pin 6, whichpasses through the perforations 3in the lugs 2. The pin is carried bythe opposite wings of the stock. The stop 5 is provided with oppositewings 6, which are perforated, as at 7.

8 is a circular hood which may be attached to the stock of the plane bymeans of lugs 9 and screws 10. The pin 6 projects through theperforations? of the wings 6. The shoe 1 and stop 5 are supported by pin6, which latter may preferably be in the form of a screw with a slottedhead 11, as shown in Fig. II.

The wings of the stop 5 are triangular in outline, one side of thetriangle being curved to conform to the contour of the hood 8 and beingconcentric therewith.

The shoe 1 is provided with a helical camface 12,which is graduallycurved away from the flat portion of the shoe 1. The straight fiatportion of the shoe is tangent to the curved cam-face 12, the point ofdeparture being slightly to the right of a line a drawn perpendicular tothe flat face of the shoe and passing through the pivotal point when theshoe lies as in Fig. V.

The stop 5 may be rocked upon the pin 6 into two positions, one positionit takes being shown in Fig. III and the other position it hen the stop5 is in the position shown in Fig. III, the shoe is prevented fromprojecting below the bottom surface of the plane.

\Vhen the carrier is in the position shown in Fig. V and the plane ismoved to and fro, the shoe is oscillated by reason of its camfacecontacting and bearing upon the/surface of the wood being planed. IVhenthe plane is being moved backward,the friction between the cam-face 12of the shoe and the upper surface of the wood rocks the shoe in thedirection indicated by the arrow, which causes the face 4 to strikeagainst the wall of the stop 5. In this position the flat portion of theshoe makes a sliding contact with the upper surface of the wood beingplaned, the plane being thereby tilted and the knife raised above thesurface of the wood.

WVhen the plane is moved ahead, friction between the wood and cam-face12 oscillates the shoe the opposite direction and throws the shoe intoapproximately the position shown in Fig. IV, in which position it hasbeen rocked to a degree snfiicient to bring the flat bearing part of theshoe away from the upper surface of the wood, leaving the retreatingpart of the cam-face 12 flush with the lower face of the plane andslightly contacting with the wood, and allowing the plane to rest flatupon the surface of the wood.

Then the plane is drawn back, the friction between the cam-face 12 andthe upper surface of the wood causes the shoe to be rocked again intothe position shown in Fig. V.

The longitudinal movement of the plane required to effect theoscillation of the shoe sufficiently to bring it into or out of positionis very slight, so that the shoe takes it position almost immediately atthe change of each stroke of the plane.

Referring to Fig. V, it will be seen that with the shoe in its lowerposition the point of tangency between the straight portion of the shoeand the curved cam-face 12is slightly to the right of a vertical linedrawn through the pin 6, so that the weight of the plane will not resultin an upward tilting of the shoe, which-might possibly occur if thepoint of tangency occurred directly under or to the left of the center.

The movable shoe 1, carried by the planestock, is adapted in itsoperative position (shown in Figs. IV and V) to operate by contact withthe surface to be planed to lift the plane on its back movement, and themovable stop 5 is adapted in one position to appropriately stop the shoeand in another position to extend below the shoe to inclose the same inthe stock. The pin 13 is adapted to engage the stock to lock the stop inone and the other of these positions at the pleasure of the operator. I

I do not propose to limit the device by any specific form of theelements shown.

The action of the shoe is entirely automatic, the friction between theshoe and wood caused by moving the plane being the force whichoscillates the shoe. Hence the action of the de- (See Figs. II andVIII.)

Each pin projects through and somewhat beyond a perforation in each wing6 of the stop. A coiled spring 14 lies between the inner ends of thepins 13 and within a tube 14 and serves to press the pins outward, sothat their shoulders rest against the inside faces of the wings 6 I Eachwing of the stock is provided with a perforation, as at 15 and 16. Theperforations 15 and 16 lie within the arcs which are described by thepins 13 when the stop is rocked. WVhen the stop is rocked into theposition shown in Fig. IV, a pin 13 enters the perforation 15, thuslocking the stop in that position. When the stop is moved into theposition shown in Fig. III, the opposite pin 13 moves into theperforation 16 on the opposite side of the hood.

In order to unlock the stop before changing its position, any convenientarticle, such as a nail, may be pressed against the end of whichever pinprojects through the hole, and the pin thereby pushed in, which unlocksthe carrier, after which the carrier may then be rocked to theposition'desired, when the opposite pin will automatically enter theopposite perforation in the hood.

The device is preferably attached to the front end of the plane, thebottom of the stock being cut away and having an opening the length ofwhich is equal to the length of the opening in the bottom of the hood toallow the shoe to protrude and also to allow the lower end of the stopto sweep around when the stop is moved from one position to the other.

During the cutting stroke of the plane the stock of the plane rests flatupon the wood, the shoe being rolled out of the way. I/Vhen the plane isdrawn back, the front end of the plane is slightly raised, the stock ofthe plane tilted, and the knife or plane-iron thereby raised slightlyabove the surface of the wood, so that dulling of the knife isprevented.

If it is desired to throw the device out of operation, the stop may bemoved to the position shown in Fig. III and locked. The plane thenoperates in the ordinary way, the knife scraping along the wood, asusual.

The flat surface of the shoe is of such size that it does not enter thesaw-kerf and cause the plane to rattle, but glides easily over theridges or rough undressed surface of the wood being planed.

It should be understood that I do not limit myself to the specificconstruction herein shown and described, as it is evident that manychanges may be made in the particular construction shown and describedwithout departing from the spirit of my invention.

When the plane is lifted away from the work, the shoe drops by gravityinto the position shown in Fig. V, so that in laying down the plane uponthe bench the shoe holds the front end of the plane up and keeps theknife off the bench.

By the term bearing-face I mean a wearing face or surface adapted torest upon and slide along the surface of the material being planed.

Now, having described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

1. Ina plane, in combination with the stock thereof, a shoe rotatablpivoted to the stock and having a face which projects below the stock,and having another face which merges with the first face and veers awayfrom the bottom of the stock whereby the friction between the shoe andthe face of the wood being planed rocks the shoe and causes the twofaces to be alternately brought into contact with the wood. therebyraising the plane during the back stroke.

2. In a plane, in combination withthe stock thereof, a shoe rotatablymounted on the stock, said shoe having a flat bearing-face, and a curvedbearing-face the distance from the pivotal point of the shoe to the flatbearing-face of the shoe being greater than the distance from saidpivotal point to the bottom of the stock.

3. In a plane, in combination with the stock thereof, a shoe rotatablyconnected to said stock, said shoe having a flat bearing-face and acurved bearing-face the distance from the pivotal point of the shoe tothe flat bearing-face of the shoe being greater than the distance fromsaid pivotal point to the bottom of the stock, and adjustable means forlimiting the movement of the shoe.

1. A planestocl a shoe rotatablymounted on the stock and adapted toproject below the stock, when in one position and adapted to not soproject when in another position and a pivot-stop adapted in oneposition to stop the shoe when it projects to lift the stock, and inanother position to extend below the shoe.

In a plane, in combination with a stock thereof, a stop pivotallyconnected to the stock and a shoe rotatably mounted on said stock, saidshoe havingahelical bearing-face and a flat bearing-face tangential tosaid helical face, said flat bearing-face being movable below the bottomof the stock.

6. A plane-stock, a shoe rotatably mounted on the stock and adapted toproject below the stock when in one position and adapted to not soproject when in another position, a stop adapted in one position to stopthe shoe, and means for locking the stop in such position.

7. A plane-stock, a shoe movably mounted on the stock and adapted toproject below the stock when in one position and adapted to not soproject when in another position, a movable stop for said shoe, andmeans for locking the stop in different positions.

8. In a plane, in combination with the stock thereof, a stop pivoted tosaid stock, and comprising a lateral wall and opposite wings, a shoepivoted to the stock and lying between said wings, said shoe having aplane bearingface and a curved bearing-face, the plane bearing-face ofthe shoe projecting below the bottom of the stock and a hood mounted onthe stock and inclosing said shoe and stop.

9. A planestock, a shoe pivoted thereon and adapted to be moved into andout of operative condition, a movable stop for limiting the swing of theshoe when in operative condition, a pin for locking the stop to thestock, and means for forcing the pin into locking position, the shoewhen in operative condition adapted to project below the stop when inone position and adapted to not so project when in another position.

10. In a plane, in combination with the stock thereof, a stop pivoted tothe stock, a shoe pivoted to the stock and projecting below the same, aspring-pressed pin slidably connected with the stop, said stock having aperforation for receiving said pin, a hood mounted on the stocl; andinclosing said shoe and stop.

11. In a plane, in combination with the stock thereof, a stop pivoted tothe stock a shoe pivoted to the stock and projecting below the same, andcomprising a wall with opposite perforated wings, lockingpins projectingthrough each wing, a spring between said locking-pins, a tube betweenthe wings inclosing the locking-pins and spring, said stock having aperforation in each side thereof to receive the locking-pins.

12. In a plane, in combination with the stock thereof, a stop pivoted tothe stock, a shoe pivoted to the stock and projecting below the same,and a single pin passing through the stock, stop, and shoe.

13. lnaplane, in combination with the stock thereof, a stop pivoted tothe stock, a shoe pivoted to the stock and projecting below the same,and a single pin passing through the stock, stop and shoe, and means forlocking said stop in different positions.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, at Los Angeles, in the COLlI1t Yof Los Augeles and State of California, this 26th day of September,1902.

H. M. VOOD.

\Yitnesses:

(inouon T. HacKLnY, Janus R. 'lowxsnxn.

